diff --git a/CLAUDE.md b/CLAUDE.md
index acd3da6..254d0e9 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -1,3 +1,3 @@
 # Claude Code Rules
 
-Always read [docs/DEV.md](docs/DEV.md) at the start of every conversation before doing any work in this project.
+Always read and respect [docs/DEV.md](docs/DEV.md) at the start of every conversation before doing any work in this project.
diff --git a/src/features/admin/components/AdminSidebar.js b/src/features/admin/components/AdminSidebar.js
index 9902e7e..4c296a2 100644
--- a/src/features/admin/components/AdminSidebar.js
+++ b/src/features/admin/components/AdminSidebar.js
@@ -23,17 +23,26 @@ function resolveIcon(iconNameOrComponent) {
 const AdminSidebar = ({ isMobileMenuOpen, setIsMobileMenuOpen, appName, enabledModules, navigationSections: serverNavigationSections }) => {
     const pathname = usePathname();
 
-    const [collapsedSections, setCollapsedSections] = useState(new Set());
+    const [collapsedSections, setCollapsedSections] = useState(() => {
+        const initial = new Set();
+        serverNavigationSections.forEach(section => {
+            const isActive = section.items.some(item =>
+                pathname === item.href || pathname.startsWith(item.href + '/')
+            );
+            if (!isActive) initial.add(section.id);
+        });
+        return initial;
+    });
 
     const toggleSection = (sectionId) => {
         setCollapsedSections(prev => {
-            const newCollapsed = new Set(prev);
-            if (newCollapsed.has(sectionId)) {
-                newCollapsed.delete(sectionId);
+            const next = new Set(prev);
+            if (next.has(sectionId)) {
+                next.delete(sectionId);
             } else {
-                newCollapsed.add(sectionId);
+                next.add(sectionId);
             }
-            return newCollapsed;
+            return next;
         });
     };
 
@@ -105,7 +114,7 @@ const AdminSidebar = ({ isMobileMenuOpen, setIsMobileMenuOpen, appName, enabledM
             );
         }
 
-        const isCollapsed = !collapsedSections.has(section.id) && !isSectionActive(section);
+        const isCollapsed = collapsedSections.has(section.id) && !isSectionActive(section);
         const isActive = isSectionActive(section);
 
         return (